Maserati Quattroporte Automatic User Manual download pdf (Page 126)

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VarioCam Plus is a two-in-one engine concept for

adjusting the intake camshafts and switching the

lift of the intake valves. The system first

differentiates between driver inputs that typify

normal, everyday driving and those inputs that

demand maximum power.

The seven-speed PDK has both a manual gearshift

and an automatic mode and enables smooth gear

changes with no interruption in the flow of power.

PDK is essentially two gearboxes in one and this

requires two clutches. This double clutch provides an

alternating, non-positive connection between the two

half gearboxes and the engine by means of two

separate input shafts

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Maserati Quattroporte Automatic User Manual Page 126